Rigid　bracing　dome　is　a　new　pre-stressed　space　structure.　In　the　study,　according　to　the　features　of　the　new　space　structure,　a　four-step　tensioning　construction　method　is　proposed　and　corresponding　tensioning　control　principle　is　also　given.　The　rigid　bracing　dome　designed　in　the　experimental　study　has　a　diameter　of　6　m　and　is　equally　divided　into　eight　parts　in　the　circumferential　direction.　The　four-step　tensioning　construction　method　is　explored　in　detail.　The　synchronous　symmetric　tensioning　schemes　in　eight　directions,　four　directions　and　two　directions　are　studied　respectively.　The　deviations　of　the　experimental　model　are　analyzed　by　using　the　orthogonal　test　design　method.　The　key　experimental　problems　are　analyzed　to　propose　corresponding　solutions.　The　construction　method　is　simple　and　efficient.　An　appropriate　symmetric　tensioning　scheme　can　be　chosen　according　to　the　requirements　of　practical　projects.　The　deviation　of　outer　ridge　cable　force　is　mainly　caused　by　the　following　factors:　vertical　coordinates　of　support　and　rods,　and　the　lengths　of　outer　ridge　cable,　inner　ridge　cable,　inner　ring　rod,　and　outer　ring　rod.　The　coordinate　deviations　of　center　rods　are　mainly　affected　by　the　lengths　of　outer　ring　rod　and　inner　ridge　cable.　The　construction　method　and　corresponding　solutions　can　be　used　to　guide　engineering　practices.